What is the function of the sclera in the eye?

The sclera serves a vital role in the overall structure and functionality of the eye. It is the tough, white outer layer that encases the eyeball, providing both protection and structural support. This protective function is essential as it shields the internal components of the eye from injury and maintains the shape of the eyeball, which is crucial for proper focusing of light onto the retina.

In contrast, the other functions described in the various options are not performed by the sclera. For instance, letting light into the eye is the primary function of the cornea and the lens, while tear production is the responsibility of the lacrimal glands. Additionally, the clarity of the view of the retina is primarily influenced by the cornea and lens, not the sclera. Understanding the specific role of the sclera helps to clarify how the eye as a whole operates in visual perception.